US4405555A - Process and device for vulcanizing power transmission belts - Google Patents

Process and device for vulcanizing power transmission belts Download PDF

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Publication number
US4405555A
US4405555A US06/279,011 US27901181A US4405555A US 4405555 A US4405555 A US 4405555A US 27901181 A US27901181 A US 27901181A US 4405555 A US4405555 A US 4405555A
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United States
Prior art keywords
belt
drum
diaphragm
base
groove
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Expired - Fee Related
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US06/279,011
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English (en)
Inventor
Paolo Egidi
Fulvio Franchino
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Industrie Pirelli SpA
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Industrie Pirelli SpA
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Assigned to INDUSTRIE PIRELLI, S.P.A. reassignment INDUSTRIE PIRELLI, S.P.A. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: EGIDI, PAOLO, FRANCHINO, FULVIO
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D29/00—Producing belts or bands
    • B29D29/10—Driving belts having wedge-shaped cross-section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/10—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies
    • B29C43/12—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies using bags surrounding the moulding material or using membranes contacting the moulding material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/818—Belt

Definitions

  • This invention relates to a process and to an apparatus for vulcanizing endless power transmission belts and, more particularly, to a process and to an apparatus for vulcanizing and molding power transmission belts, as, for example, V-belts, of cross-linkable elastomeric or plastomeric material.
  • An object of the present invention is to provide a process which overcomes the drawbacks of the known processes and, in particular, to provide a process which guarantees complete vulcanization of the body of the power transmission belt, by vulcanizing at the same time at least three sides of the belt and by assuring the maintenance of a correct arrangement of the tension resistant insert member in order to guarantee good operation and a long belt lifetime.
  • a further object of the present invention is to provide a device for vulcanizing power transmission belts in accordance with the process of the invention and to produce belts which have improved characteristics.
  • a process for vulcanizing substantially uniformly a vulcanizable elastomeric or plastomeric endless power transmission belt which is substantially V-shaped in cross-section having minor and major bases and sides which converge from the major base to the minor base to provide flanks for engaging corresponding surfaces and rotate a pulley.
  • the belt is vulcanized substantially uniformly by heating the belt to the vulcanizing temperature by exposure of only its minor base and flanks to heated surfaces and by exposure of the minor base and flanks to a lower temperature when the temperature to which the major base is exposed to cool the belt to ambient temperature.
  • the invention also provides an apparatus for practicing the process which has a substantially cylindrical drum provided with at least one annular groove corresponding in cross-section substantially to the cross-section of the belt to be cured and having heated surfaces which contact the minor base and flanks of a belt disposed therein with a major base substantially flush with the surface of the drum and a substantially cylindrical, hollow jacket disposed substantially concentrically about but spaced radially outwardly from the surface of the drum.
  • An annular inflatable diaphragm is disposed in the annular space between the inner wall of the jacket and the surface of the drum. Fittings are connected to opposite ends of the diaphragm for inflating the diaphragm with a fluid under pressure to press the belt into the groove against the heated surfaces.
  • the process of the invention thus comprises the steps of
  • the invention also provides an apparatus for vulcanizing power transmission belts comprising a drum provided with at least two plates having their outer surfaces faceted so as to define at least one circumferential groove when the plates are in contact with each other, characterized by the fact of comprising heating means placed in correspondence of the facetings in the plates.
  • a process according to the invention for vulcanizing power transmission belts comprises the steps of arranging coaxially with each other a jacket provided in its inside with a flexible diaphragm on a drum provided with at least one circumferential groove within which a belt to be vulcanized is disposed, applying pressure on the outermost surface of the belt by inflating the diaphragm to smooth the belt while the belt is uniformly heated along at least three of its sides, collapsing the diaphragm, moving the jacket and finally cooling differentially the belt so as to complete the vulcanization before removing the belt from the drum.
  • a rigid jacket is disposed, in coaxial relationship about a collapsible drum, so that the drum becomes completely inserted within the jacket.
  • the drum is provided with at least one circumferential groove having the shape and dimensions of the belt to be vulcanized and within which a belt is disposed.
  • the belt has its convergent sides (i.e. the flanks) and its smaller base in contact with the walls of the groove, while its larger base is substantially at the same level as the cylindrical surface of the drum.
  • the jacket is provided on its inner surface with a flexible diaphragm and as a second step of the process, the diaphragm is inflated to apply pressure on the outermost surface of the belt to be vulcanized and, preferably, on the larger base of the belt, smoothing the larger base as will be described hereinafter, through means for smoothing the belts present on the diaphragm surface which is in contact with the belt.
  • the diaphragm is inflated by conveying a fluid under pressure into the diaphragm.
  • the fluid is steam so the belt is heated uniformly along its sides.
  • the side corresponding to the larger base is heated by means of steam present in the diaphragm, while the other three sides, i.e. the smaller base and the two flanks of the belt are heated uniformly and practically immediately by steam circulating in suitable conduits, the conduits being disposed in the drum in the zones immediately adjacent to the walls of the grooves.
  • the circulation of steam is interrupted in the conduits adjacent to the grooves and in the diaphragm, the diaphragm is thus collapsed and the jacket can be moved axially until it no longer encompasses the drum.
  • cooling of the greater base begins from the moment in which the jacket is removed from its position of coaxial coupling on the drum and takes place through radiation and convection of heat toward the ambient surrounding the drum.
  • the two flanks of the belt and the smaller base are cooled by circulating a cooling fluid, as for example, cold water, in the conduits adjacent to the walls of the groove.
  • a cooling fluid as for example, cold water
  • vulcanization of the belts is finished particularly in those innermost layers of the belt where the belt has a greater thickness (i.e. in the area beneath the greater base).
  • This step is effected preferably by collapsing the drum into its various parts, for example by moving away each plate making part of the drum from the remaining part of the drum to free the belts present in the grooves in the zones where two adjacent plates come into contact, as will be described hereinafter.
  • the present invention comprises a device for vulcanizing power transmission belts comprising, in its more general aspects, a drum provided with at least two plates having their outer surfaces facing each other faceted so as to define at least a circumferential groove when said plates are advanced into contact with each other and heating means placed in the plates adjacent to the facetings.
  • the apparatus for vulcanizing and molding V-belts comprises a drum 1 formed of at least one right plate 2 and by a left plate 3. At least one intermediate plate 4 is disposed between the two plates 2 and 3.
  • each plate directed toward the adjacent plate is provided with such facetings as to define at least one circumferential groove, the groove having the shape and dimensions of the belt to be vulcanized, when the plates are advanced into contact with one another.
  • the plates can be separated from one another to permit the belts already vulcanized in the grooves to be removed.
  • At least one of the two end plates (the right plate 2 in the FIGURE) is provided with means adapted to move the plate axially to draw it away from the left plate 3 and from the intermediate plate 4.
  • This means can be of any type and is not part of the inventive idea of the present invention.
  • a piston 7 (indicated with dashed line) inserted in a cylinder 8 is fixed to the ground 11.
  • Cylinder 8 is preferably provided with two inlets/outlets 9 for the fluid under pressure to move stem 10 of piston 7 and the right plate 2 along the axis of the drum 1 in both directions.
  • the left plate 3 can be provided with means suitable to move it axially or plate 3 can be fixed with respect to an outer element (as indicated in the FIGURE) by means of any stationary support 11 to which a rod 12, integral with the left plate 3, is connected.
  • the connecting means can be of any type and are not an object of the present invention; however, by way of example, pins and corresponding holes or levers movable from outside manually or automatically can be used.
  • FIG. 1 an example is shown of these latter which connect the right plate 2 to an intermediate plate 4 and which comprise a lever 13 hinged to the right plate 2 provided with a hook-shaped end 14 which engages in a projection 15 present on the lip of a slot 16 of the intermediate plate 4.
  • Lever 13 is provided with elastic means such as helical spring 17 at the end opposite to the hook-shaped end which guarantees closure. To separate the two plates, the end of lever 13 is activated as indicated by the arrow in the flange in opposition to spring 17.
  • a plurality of levers 13 can be present on each plate in order to guarantee effective and sure assembly of drum 1.
  • the plates of drum 1 according to the present invention are provided, as already indicated, with facetings on their outer circumferential surfaces facing the other plates so as to define grooves 6 when the plates are in contact with one another.
  • the end plates 2 and 3 are provided with facetings only on their side directed toward the inside of the drum, while the intermediate plates 4 are provided with facetings on both sides.
  • each intermediate plate 4 and of the left plate 3 comprises a first conical faceting 18 and a second cylindrical faceting 19, the facetings will be in contact, respectively, with a flank and with the smaller base of the belt 5 which is vulcanized in groove 6 determined by the facetings.
  • groove 6 is formed by a second conical faceting 20 symmetrical with respect to the conical faceting 18 present on the left side of each intermediate plate 4 and on the right plate 2.
  • the device provided by the invention is characterized by the fact of comprising heating means placed in the plates in correspondence of facetings 18, 19 and 20.
  • the heating means are, in the particular embodiment shown in the FIGURE, circumferential conduits 22 formed in the plates under the surfaces of the facetings 18, 19 and 20 which define the grooves.
  • Conduits 22 have preferably a quadrangular shape so as to be able to extend substantially for the whole length of the facetings i.e. substantially for the whole extension of the smaller base and of the flanks of the belts to be vulcanized.
  • FIGURE shows three distinct conduits 22 for each groove 6, two conduits in place of the three conduits 22 may be used. Of the two conduits, one extends along a flank and along the smaller base of the groove 6, while the other conduit extends along the other flank of the belt. In fact, what is essential is that along each flank and along the smaller base of the groove 6 there is a means which heats directly the flanks and the smaller base.
  • the present invention provides means for circulating a heating fluid, such as steam, through the conduits.
  • the circulating means comprise an inlet union 23 and an outlet union 24 and a plurality of connecting conduits 25 (indicated with dashed line in the FIGURE) to permit steam to pass from one conduit 22 to the adjacent one after that steam has crossed each conduit 22 along the whole circumference of the plate.
  • the connecting conduits 25 are provided with suitable unions (indicated with 26) between one plate and the adjacent ones.
  • Unions 27 are all aligned with one another (i.e. preferably arranged on only one circumference, the various plates being able to rotate for aligning the unions) to insert or remove intermediate plates 4 in order to vary the number of grooves of the drum 1.
  • the device according to the present invention provides moreover a cylindrical jacket 27 which can be moved axially with respect to the drum 1.
  • Jacket 27 can assume the position shown in the FIGURE through means of any conventional type which are not part of the present invention.
  • the translating means may be a cylinder-piston device or, as shown in the FIGURE, two or more devices 28 provided with travelling tracks 29 which can move the jacket in one diirection or in the other.
  • the jacket can be provided with suitable guides to guarantee correct positioning of concentricity with respect to the drum.
  • Jacket 27 is provided on its inner surface with a flexible and inflatable diaphragm 30 of elastomeric material provided in its own inside for instance with a resisant insert, such as a fabric.
  • Jacket 27 is, moreover, provided with means for conveying a fluid under pressure into the diaphragm, the conveying means comprising an inlet union 31 and an outlet union 32 for fluid under pressure, this latter being a heating fluid, as for example, steam.
  • Diaphragm 30 is moreover provided with means for smoothing the belts, present on the drum 1 in grooves 6, on its inner surface facing the drum.
  • the smoothing means comprise a low coefficient of friction layer and, in particular, a layer 33 of polytetrafluoroethylene bonded to the surface of the diaphragm 30 directed toward and in contact with drum 1.
  • the device according to the present invention starting from the moment in which the belts to be vulcanized are placed in the groove 6 of the drum 1, operates as follows:
  • Jacket 27 is translated by the travelling track devices 28 to the position shown in the drawing.
  • Drum 1 is thus arranged coaxially with the jacket 27.
  • inlet union 31 is connected with a suitable steam source at the desired pressure and temperature to inflate the diaphragm 30 and apply pressure by means of the layer 33 on the larger base of the belts to be vulcanized, the pressure tending to smooth out the belts.
  • outlet union 32 is connected to a suitable drainage element.
  • the inlet unions 23 and the outlet unions 24 of the various conduits 22 are connected with a steam source.
  • every single belt 5 to be vulcanized receives heat the same time through all the surfaces of the facetings 18, 19, 20 and through the layer 33 receiving thus the heat in uniform manner through all its four sides.
  • inlet unions 23 and outlet unions 24 are connected, respectively, with a source of cold fluid, such as water, and with a suitable drainage element.
  • a source of cold fluid such as water
  • Vulcanization of the elastomeric material is thus stopped practically immediately along the sides of the belt corresponding to the two convergent lateral flanks and to the smaller base, while vulcanization continues of the innermost material of the belt body and also in the layers underlying the larger base.
  • the means blocking the various plates are set in action, for example the end of the lever 13, to disengage it from projection 15 present on the intermediate plate 4 adjacent to the right plate 2.
  • sending fluid under pressure into the cylinder 8 through the union 9, translates piston 7 towards the right; piston 7 moves away from the other plates of drum 1 and the vulcanized belt present in groove 6 adjacent to the right plate 2 can be removed from groove 6.
  • the fluid under pressure is conveyed into cylinder 8 to translate piston 7 towards the left side and the hook-shaped end 14 of the lever 13 is engaged in the projection 15 present in intermediate plate 4.
  • cylinder 8 can be activated again to translate the right plate 2 together with the intermediate plate 4 adjacent to it towards the right side after having disengaged the intermediate plate 4 from the adjacent one placed to its left, to free and to remove the second of the vulcanized belts present on the drum.
  • the removal of the vulcanized belts can be made manually after the right plate 2 has been transferred toward the right for the first time freeing the single intermediate plates 4, one at a time, from the remaining part of the plates still forming the drum 1.
  • the drum 1 can be reassembled with the various plates associated with one another, placing again the right plate 2 in contact with the remaining plates and the previously described cycle can be started anew.
  • the process provided by the invention permits production of power transmission belts and in particular power transmission V-belts which are devoid of the drawback of having one of their surfaces overheated as in the belts of the prior art in which the heat reaches the belt mainly through only one side.
  • the process according to the present invention makes it possible to heat uniformly the belt on its four sides and in particular permits, thanks to the presence of the conduits in the body of the plates adjacent to the walls of the facetings, to heat in a uniform way and to furnish the heat at the desired rate at least to the three more delicate sides of the belt.
  • the elastomeric material Because of the particular way of advancing heat through the inside of the belt during the "vulcanization" phenomenon, the elastomeric material first softens and then cross-linking of the elastomer occurs with consequent hardening and because the elastomeric material is a good heat insulator, when the softening of the elastomeric material of the larger base of the belt occurs, in proximity of which the tension resistant insert is positioned, a substantial hardening of underlying elastomeric material has already taken place and this assures perfect maintenance of the position of the tension resistant insert member in the belt.
  • the differential cooling made on the belt assures that vulcanization of the belt sides, corresponding to the convergent lateral flanks and to the smaller base is discontinued at the desired time since cooling of the three sides in contact with the metallic walls of the groove occurs almost instantaneously because the cooling water circulating inside the conduits is opposite the three sides of the belt and is separated from the belt only by a thin metallic wall, and therefore its cooling is very quick.
  • the larger base is the one which requires the least attention. It is known that belt breaking starts most frequently from the smaller base, while the two lateral flanks are the working surfaces of the belts.
  • the larger base is the part which is at a greater temperature from moment to moment than the other ones and is the part which is near the tension resistant member inserted in the belt.
  • the tension resistant member is an element which has high tensile strength capacities.
  • microcracks cause premature breaking of the belt since they act as initiating points for breaks. Instead, by leaving one side, and in particular the less delicate side corresponding to the larger base, at a higher temperature, the belt can shrink during cooling in this direction so that the already stabilized three sides are not involved in the phenomenon of concentration of the stresses due to the contraction of the central part of the belt body when it becomes cold.
  • the flashing step of the conduits favors better operation of the device by eliminating condensate or steam pockets in the conduits, the risk of hammerblows in the conduits is also eliminated when the cold water begins to circulate protecting the various unions present inside the drum.
  • the device according to the present invention also fulfills the objects of the invention, since substantial steam savings are realized in heating the mold because the forced cooling occurs only near groove 6.
  • the jacket and the diaphragm associated with the jacket are not at all involved in water cooling of the belt, but are cooled only by radiation and convection of the outer surface of the jacket, which however, if desired, can be provided with a layer of insulating material. Therefore, a large part of the body of the mold acts as a thermal flywheel maintaining a great quantity of the heat supplied during the first vulcanization so as to require less consumption of steam for all the subsequent vulcanizations.
  • the belts are cooled without being immersed in water and therefore no water is absorbed by the body of the belts with consequent possible damage to the tension resistant insert member present in the belts and, moreover, no problems during insertion of the belts into the mold are involved because the belts contact cold surfaces.
  • the layer of low coefficient of friction material for example, polytetrafluoroethylene on the side of the diaphragm facing the belts, produces a double advantage.
  • the low friction material makes it possible to smooth the outer surface of the belt, both by facilitating, just because of its low friction coefficient, the migration of the rubber from those points where it is overabundant to those where it is scarce, and, being more rigid than the known flexible diaphragms, by exerting a greater and more uniform molding pressure on the surface of the belt which also facilitates migration of the elastomeric material from the zones where it is in excess to the zones where it is scarce.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Thermal Sciences (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
US06/279,011 1980-07-18 1981-06-30 Process and device for vulcanizing power transmission belts Expired - Fee Related US4405555A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT23522A/80 1980-07-18
IT23522/80A IT1131714B (it) 1980-07-18 1980-07-18 Procedimento e dispositivo per la vulcanizzazione di cinghie di trasmissione

Publications (1)

Publication Number Publication Date
US4405555A true US4405555A (en) 1983-09-20

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ID=11207838

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/279,011 Expired - Fee Related US4405555A (en) 1980-07-18 1981-06-30 Process and device for vulcanizing power transmission belts

Country Status (12)

Country Link
US (1) US4405555A (es)
JP (1) JPS5774144A (es)
AR (1) AR224958A1 (es)
BR (1) BR8104678A (es)
DE (1) DE3128211A1 (es)
ES (1) ES8204340A1 (es)
FR (1) FR2486866A1 (es)
GB (1) GB2080190A (es)
GR (1) GR74320B (es)
IL (1) IL63271A0 (es)
IT (1) IT1131714B (es)
YU (1) YU148081A (es)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4626232A (en) * 1984-10-09 1986-12-02 Dayco Corporation Belt construction and method of making the same
US20110159135A1 (en) * 2009-12-30 2011-06-30 Desmarais Thomas Allen System for producing high internal phase emulsion foam

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2595613A1 (fr) * 1986-01-30 1987-09-18 Bruss Polt I Dispositif de moulage et de vulcanisation de pieces en polymeres en particulier pour la fabrication de courroies dentees
JPS63502259A (ja) * 1986-01-30 1988-09-01 ベロルススキイ　ポリテクニチェスキイ　インスチチュ−ト ポリマ−製品の加圧成形及び硬化用装置
DE102015217869A1 (de) 2015-09-17 2017-03-23 Contitech Antriebssysteme Gmbh Heizmanschette als Bauteil einer Vulkanisationsvorrichtung, insbesondere zur Herstellung eines Antriebsriemens oder einer Luftfeder
DE102020208967A1 (de) 2020-07-17 2022-01-20 Contitech Antriebssysteme Gmbh Heizmanschette mit PTFE-Belegung zur Vulkanisation von Antriebsriemen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2599046A (en) * 1947-11-29 1952-06-03 Goodrich Co B F Vulcanizing annular articles
US2600775A (en) * 1950-12-27 1952-06-17 Gates Rubber Co Method and apparatus for making and curing power transmission belts
US2647280A (en) * 1950-11-07 1953-08-04 Goodrich Co B F Manufacture of vbelts
SU509451A1 (ru) * 1975-01-02 1976-04-05 Устройство дл формовани и вулкани-зации кольцевых резиновых изделий

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB288780A (en) * 1927-02-24 1928-04-19 Dunlop Rubber Co Improvements in or relating to endless belts and the manufacture thereof
US2573643A (en) * 1948-04-03 1951-10-30 Gates Rubber Co Mold for manufacturing and curing transmission belts
US2569303A (en) * 1950-10-31 1951-09-25 Goodrich Co B F Manufacture of endless v belts
US2883701A (en) * 1955-05-19 1959-04-28 Us Rubber Co Apparatus for molding v-belts
US3398218A (en) * 1965-04-22 1968-08-20 Dayco Corp Method and apparatus for manufacturing transmission belts
US3932078A (en) * 1975-03-13 1976-01-13 The Gates Rubber Company Apparatus for manufacturing power transmission belting
US4095480A (en) * 1975-09-29 1978-06-20 The Gates Rubber Company Method for making power transmission belting

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2599046A (en) * 1947-11-29 1952-06-03 Goodrich Co B F Vulcanizing annular articles
US2647280A (en) * 1950-11-07 1953-08-04 Goodrich Co B F Manufacture of vbelts
US2600775A (en) * 1950-12-27 1952-06-17 Gates Rubber Co Method and apparatus for making and curing power transmission belts
SU509451A1 (ru) * 1975-01-02 1976-04-05 Устройство дл формовани и вулкани-зации кольцевых резиновых изделий

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4626232A (en) * 1984-10-09 1986-12-02 Dayco Corporation Belt construction and method of making the same
US20110159135A1 (en) * 2009-12-30 2011-06-30 Desmarais Thomas Allen System for producing high internal phase emulsion foam
US8770956B2 (en) * 2009-12-30 2014-07-08 The Procter & Gamble Company System for producing high internal phase emulsion foam

Also Published As

Publication number Publication date
ES504386A0 (es) 1982-05-01
JPS5774144A (en) 1982-05-10
FR2486866A1 (fr) 1982-01-22
GB2080190A (en) 1982-02-03
IT8023522A0 (it) 1980-07-18
IL63271A0 (en) 1981-10-30
GR74320B (es) 1984-06-22
YU148081A (en) 1983-12-31
BR8104678A (pt) 1982-04-06
ES8204340A1 (es) 1982-05-01
DE3128211A1 (de) 1982-04-15
IT1131714B (it) 1986-06-25
AR224958A1 (es) 1982-01-29

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